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Zhang Y, Feng T, Hu T, Wang Y, Le Y. A New Phenothiazine-Based Fluorescent Probe for Rapid and Specific Detection of Fluoride. J Fluoresc 2024:10.1007/s10895-024-03856-w. [PMID: 39037680 DOI: 10.1007/s10895-024-03856-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Accepted: 07/15/2024] [Indexed: 07/23/2024]
Abstract
Fluorescent probes with specific and rapid response to fluoride ions are important mediators for detecting fluoride ions in biological systems. In this study, a phenothiazine-based fluorescent probe, PTC, was designed and synthesized, which undergoes cleavage activation and cyclization induced by fluoride ions targeting Si-O bonds. The probe exhibits strong anti-interference properties and reaches peak fluorescence within 5 min, allowing for quantitative detection of fluoride ions content in the concentration range of 0 to 12.5μM, suitable for live cell fluorescence imaging. The research findings suggest its potential application value in biological systems.
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Affiliation(s)
- Ying Zhang
- School of Pharmaceutical Sciences, Guizhou University, Guiyang, 550025, China
| | - Tingting Feng
- School of Pharmaceutical Sciences, Guizhou University, Guiyang, 550025, China
| | - Taozhu Hu
- School of Pharmaceutical Sciences, Guizhou University, Guiyang, 550025, China
| | - Yi Wang
- School of Pharmaceutical Sciences, Guizhou University, Guiyang, 550025, China
| | - Yi Le
- School of Pharmaceutical Sciences, Guizhou University, Guiyang, 550025, China.
- Guizhou Engineering Laboratory for Synthetic Drugs, Guiyang, 550025, China.
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2
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El Messaoudi N, Franco DSP, Gubernat S, Georgin J, Şenol ZM, Ciğeroğlu Z, Allouss D, El Hajam M. Advances and future perspectives of water defluoridation by adsorption technology: A review. ENVIRONMENTAL RESEARCH 2024; 252:118857. [PMID: 38569334 DOI: 10.1016/j.envres.2024.118857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 03/29/2024] [Accepted: 04/01/2024] [Indexed: 04/05/2024]
Abstract
Fluoride contamination in water sources poses a significant challenge to human health and the environment. In recent years, adsorption technology has emerged as a promising approach for water defluoridation due to its efficiency and cost-effectiveness. This review article comprehensively explores the advances in water defluoridation through adsorption processes. Various adsorbents, including natural and synthetic materials, have been investigated for their efficacy in removing fluoride ions from water. The mechanisms underlying adsorption interactions are elucidated, shedding light on the factors influencing defluoridation efficiency. Moreover, the review outlines the current state of technology, highlighting successful case studies and field applications. Future perspectives in the field of water defluoridation by adsorption are discussed, emphasizing the need for sustainable and scalable solutions. The integration of novel materials, process optimization, and the development of hybrid technologies are proposed as pathways to address existing challenges and enhance the overall efficacy of water defluoridation. This comprehensive assessment of the advances and future directions in adsorption-based water defluoridation provides valuable insights for researchers, policymakers, and practitioners working towards ensuring safe and accessible drinking water for all.
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Affiliation(s)
- Noureddine El Messaoudi
- Laboratory of Applied Chemistry and Environment, Faculty of Sciences, Ibn Zohr University, Agadir, 80000, Morocco.
| | - Dison Stracke Pfingsten Franco
- Department of Civil and Environmental, Universidad de la Costa, CUC, Calle 58 # 55-66, Barranquilla, Atlántico, Colombia
| | - Sylwia Gubernat
- Inżynieria Rzeszów S.A., ul. Podkarpacka 59A, 35-082, Rzeszów, Poland
| | - Jordana Georgin
- Department of Civil and Environmental, Universidad de la Costa, CUC, Calle 58 # 55-66, Barranquilla, Atlántico, Colombia.
| | - Zeynep Mine Şenol
- Sivas Cumhuriyet University, Faculty of Health Sciences, Department of Nutrition and Diet, 58140, Sivas, Turkey
| | - Zeynep Ciğeroğlu
- Department of Chemical Engineering, Faculty of Engineering and Natural Sciences, Usak University, Usak, 64300, Turkey
| | - Dalia Allouss
- Laboratory of Materials, Catalysis & Valorization of Natural Resources, FSTM, Hassan II University, Casablanca, Morocco
| | - Maryam El Hajam
- Advanced Structures and Composites Center, University of Maine, Orono, 04469, United States
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3
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Sharma M, Karthik K, Keerthi P, Chatterjee S. Polyacrylonitrile and polyethersulfone based co-axial electrospun nanofibers for fluoride removal from contaminated stream. CHEMOSPHERE 2024; 349:140837. [PMID: 38065266 DOI: 10.1016/j.chemosphere.2023.140837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 11/10/2023] [Accepted: 11/26/2023] [Indexed: 01/10/2024]
Abstract
Coaxial electrospun polyacrylonitrile (PAN) and polyethersulfone (PES) based nanofibers were prepared and was used for filtration of fluoride from drinking water for the first time. Well defined fiber geometry was obtained at 1 ml/h of core polymer, i.e., PES flow rate, 1.4 ml/h of shell polymer, i.e., PAN flow rate, voltage of 22 kV, while the distance between the needle tip and the collector was 15-17 cm. Increase in bead like structure in fiber strands was observed with higher PAN concentration, while it decreased for lower PES concentration, thereby giving an optimum composition (6 wt% PAN and 10 wt% PES) for uniform fiber morphology. This nanofiber, abbreviated as N2 acted as an ultrafiltration membrane having permeability in the lower range, i.e., 0.5 × 10-11 m/s Pa and its fluoride removal efficacy was 46%. Fibers were also hydrophilic with considerable porous nature. Uptake of fluoride by this N2 nanofibers were evident from binding energy of 685.2 eV during XPS analysis. It is probable that nitrile and sulfone groups present in the core and shell of the nanofibers played an active in fluoride uptake, which was estimated as 110 mg/g at 298 K. Isoelectric point was in alkaline range which promoted negative fluoride ion uptake on positive nanofiber surface. Lead played higher masking effect in the uptake of fluoride in comparison to arsenic as coexisting ion. Dynamic cross flow filtration was also studied with this nanofiber in both synthetic and real life feed solution.
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Affiliation(s)
- Manu Sharma
- Department of Chemical Engineering, BITS-Pilani, Pilani, Rajasthan 333031, India
| | - K Karthik
- Department of Chemistry, Anna University, Chennai, Tamil Nadu 600025, India
| | - P Keerthi
- Department of Chemistry, Anna University, Chennai, Tamil Nadu 600025, India
| | - Somak Chatterjee
- Department of Chemical Engineering, BITS-Pilani, Pilani, Rajasthan 333031, India.
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4
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Teju MD, Majamo SL. Synthesis and application of lanthanum-doped magnetic biochar composite adsorbent for removal of fluoride from water. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:1469. [PMID: 37962700 DOI: 10.1007/s10661-023-12075-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 10/30/2023] [Indexed: 11/15/2023]
Abstract
Fluoride levels greater than 1.5 mg/L in drinking water are a global environmental issue that can seriously harm the health of humans. One of the most effective techniques for defluoridating water is adsorption. The main drawbacks of many adsorbent materials include their poor adsorption capabilities, prolonged contact times, excessively low or high pH levels, and high dosages. The biochar-based magnetic nanocomposite adsorbent was synthesized in the current study and used as an adsorbent for water defluoridation. Through slow pyrolysis, coffee husk waste was converted to biochar. The composite was created by chemically co-precipitating iron and lanthanum oxide nanoparticles onto the surface of biochar. By using X-ray diffraction analysis (XRD), Fourier transform infrared spectrometry (FTIR), Brunauer-Emmett-Teller (BET), and pHPZC values, researchers were able to describe the magnetic biochar nanocomposite material. The Central Composite Design (CCD), which uses four input variables including dosage (2-5 g/L), solution pH (4-8), contact time (30-70 min), and initial concentration (10-20 mg/L), was used to design the experiments. The quadratic model indicated that the ideal conditions for removing 98.994% of the fluoride from water (adsorbent dosage of 5 g L-1, pH 5.74, contact period of 60 min, and initial concentration of 12.245 mg/L) would be attained. The average triplicate value in ideal circumstances produced a removal effectiveness of 98.51%, demonstrating the proposed response surface's capacity for prediction. The findings of this investigation showed that the magnetic biochar nanocomposite that was created is an effective fluoride adsorbent.
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Affiliation(s)
- Merid Debebe Teju
- Department of Chemical Engineering, Kombolcha Institute of Technology, Wollo University, Wollo, Ethiopia
| | - Samuel Latebo Majamo
- Department of Chemical Engineering, College of Engineering and Technology, Wachemo University, Hossana, Ethiopia.
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Malik A, Katyal D, Narwal N, Kataria N, Ayyamperumal R, Khoo KS. Sources, distribution, associated health risks and remedial technologies for inorganic contamination in groundwater: A review in specific context of the state of Haryana, India. ENVIRONMENTAL RESEARCH 2023; 236:116696. [PMID: 37482126 DOI: 10.1016/j.envres.2023.116696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/12/2023] [Accepted: 07/16/2023] [Indexed: 07/25/2023]
Abstract
Haryana is one of the leading states in India in the agricultural and industrial production. With the expansion of these sectors, a continuous increase in water demand is leading to water crises arising from overexploitation and quality deterioration of the available water. Contamination of aquifer resources is a significant concern, because majority of population depends on the groundwater for various agricultural, industrial, and domestic needs. This review article provides an overview of groundwater contamination, associated health risks with different contaminants with regions severely affected by poor water quality, and delves in identifying the sources, by observing and recognising the types of industries dominant in the state with types of effluents discharge. It further suggests the possible mitigation measures such as advanced remedial technologies and proper management practices from the consequent contamination sources. It has been observed during the perusal of various studies and data that the degree of contamination was considerably higher in districts with heavy agro-industrial activities. The groundwater resources in three highly industrialized districts were found to be gravely contaminated with toxic heavy metals. Alongwith heavy metals, the salinity, hardness, nitrate, and fluoride are also posing significant problems in the aquifer resources of Haryana state. The article also discusses various technologies for remediation of different pollutants from groundwater so it can be made potable after treatment.
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Affiliation(s)
- Aastha Malik
- University School of Environment Management, Guru Gobind Singh Indraprastha University, New Delhi, 110078, India
| | - Deeksha Katyal
- University School of Environment Management, Guru Gobind Singh Indraprastha University, New Delhi, 110078, India.
| | - Nishita Narwal
- University School of Environment Management, Guru Gobind Singh Indraprastha University, New Delhi, 110078, India
| | - Navish Kataria
- Department of Environmental Sciences, J. C. Bose University of Science & Technology, YMCA, Faridabad, 121006, Haryana, India
| | | | - Kuan Shiong Khoo
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan, Taiwan; Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, 603103, Tamil Nadu, India.
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Shekhawat A, Jugade R, Kahu S, Saravanan D, Deshmukh S. Mesoporous Cellulose assemblage Al-doped ferrite for sustainable defluoridation process based on parameters optimization through RSM. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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7
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Kumar R, Sharma P, Yang W, Sillanpää M, Shang J, Bhattacharya P, Vithanage M, Maity JP. State-of-the-art of research progress on adsorptive removal of fluoride-contaminated water using biochar-based materials: Practical feasibility through reusability and column transport studies. ENVIRONMENTAL RESEARCH 2022; 214:114043. [PMID: 36029838 DOI: 10.1016/j.envres.2022.114043] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 07/15/2022] [Accepted: 08/02/2022] [Indexed: 06/15/2023]
Abstract
Fluoride (F-) is one of the essential elements found in soil and water released from geogenic sources and several anthropogenic activities. Fluoride causes fluorosis, dental and skeletal growth problems, teeth mottling, and neurological damage due to prolonged consumption, affecting millions worldwide. Adsorption is an extensively implemented technique in water and wastewater treatment for fluoride, with significant potential due to efficiency, cost-effectiveness, ease of operation, and reusability. This review highlights the current state of knowledge for fluoride adsorption using biochar-based materials and the limitations of biochar for fluoride-contaminated groundwater and industrial wastewater treatment. Biochar materials have shown significant adsorption capacities for fluoride under the influence of low pH, biochar dose, initial concentration, temperature, and co-existing ions. Modified biochar possesses various functional groups (-OH, -CC, -C-O, -CONH, -C-OH, X-OH), in which enhanced hydroxyl (-OH) groups onto the surface plays a significant role in fluoride adsorption via electrostatic attraction and ion exchange. Regeneration and reusability of biochar sorbents need to be performed to a greater extent to improve removal efficiency and reusability in field conditions. Furthermore, the present investigation identifies the limitations of biochar materials in treating fluoride-contaminated drinking groundwater and industrial effluents. The fluoride removal using biochar-based materials at an industrial scale for understanding the practical feasibility is yet to be documented. This review work recommend the feasibility of biochar-based materials in column studies for fluoride remediation in the future.
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Affiliation(s)
- Rakesh Kumar
- School of Ecology and Environment Studies, Nalanda University, Rajgir, Bihar, 803116, India
| | - Prabhakar Sharma
- School of Ecology and Environment Studies, Nalanda University, Rajgir, Bihar, 803116, India.
| | - Wen Yang
- Agronomy College, Shenyang Agricultural University, Shenyang, China
| | - Mika Sillanpää
- Department of Chemical Engineering, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg, P. O. Box 17011, Doornfontein, 2028, South Africa; Chemistry Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia; Department of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia; International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, Solan, 173212, Himachal Pradesh, India
| | - Jianying Shang
- Department of Soil and Water Science, China Agricultural University, Beijing, 100083, China
| | - Prosun Bhattacharya
- Department of Sustainable Development, Environmental Sciences and Engineering, KTH Royal Institute of Technology, Teknikringen, 10B SE-100 44, Stockholm, Sweden
| | - Meththika Vithanage
- Ecosphere Resilience Research Center, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda, 10250, Sri Lanka; Sustainability Cluster, School of Engineering, University of Petroleum and Energy Studies, Dehradun, Uttarakhand, 248007, India
| | - Jyoti Prakash Maity
- Department of Chemistry, School of Applied Sciences, KIIT Deemed to Be University, Bhubaneswar, Odisha, 751024, India
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8
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Ni C, Liu C, Xie Y, Xie W, He Z, Zhong H. A critical review on adsorption and recovery of fluoride from wastewater by metal-based adsorbents. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:82740-82761. [PMID: 36224467 DOI: 10.1007/s11356-022-23416-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 09/28/2022] [Indexed: 06/16/2023]
Abstract
Rapid industrialization is deteriorating water quality, and fluoride pollution in water is one of the most serious environmental pollution problems. Adsorption technology is an efficient and selective process for removing fluoride from aqueous solutions using adsorbents. Metal-based adsorbents synergize the advantages of fast adsorption, high adsorption capacity, and excellent selectivity to effectively remove fluoride from water bodies, promising to satisfy environmental sustainability requirements. This paper reviews the metal-based adsorbents: iron-based, aluminum-based, lanthanum-based, cerium-based, titanium-based, zirconium-based, and multi-metal composite adsorbents, primarily focusing on the adsorption conditions and fluoride removal capacities and discusses prospects and challenges in the synthesis and application of metal-based adsorbents. This paper aims to stimulate new thinking and innovation in developing the next generation of sustainable adsorbents.
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Affiliation(s)
- Chenquan Ni
- Key Laboratory of Biohydrometallurgy of Ministry of Education, School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Chang Liu
- School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, 100083, China
| | - Yu Xie
- Key Laboratory of Biohydrometallurgy of Ministry of Education, School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Weiqi Xie
- Key Laboratory of Biohydrometallurgy of Ministry of Education, School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Zhiguo He
- Key Laboratory of Biohydrometallurgy of Ministry of Education, School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China.
- Aerospace Kaitian Environmental Technology Co., Ltd, Changsha, 410100, China.
| | - Hui Zhong
- School of Life Science, Central South University, Changsha, 410012, China
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Laonapakul T, Suthi T, Otsuka Y, Mutoh Y, Chaikool P, Chindaprasirt P. Fluoride Adsorption Enhancement of Calcined-Kaolin/Hydroxyapatite composite. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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10
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Saraiva ÍCG, Ezaki S, Calabria GD, Shinzato MC. Groundwater defluoridation efficacy of manganese-oxide-coated alumina prepared via two-step heating. ENVIRONMENTAL TECHNOLOGY 2022; 43:2684-2696. [PMID: 33615995 DOI: 10.1080/09593330.2021.1894242] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 02/17/2021] [Indexed: 06/12/2023]
Abstract
Fluoride concentrations in groundwater can be high in some Brazilian aquifers and therefore these waters should be treated before consumption. This study assessed the properties of Mn-oxide-coated alumina (AM) prepared by two-step heating in water defluoridation. The release of secondary contaminants (e.g. Al3+ and Mn2+) from alumina was also examined, as their removal by vermiculite. The process of Mn-oxide coating changed some properties of the activated alumina (AA), decomposing the crystalline phases and reducing some parameters, e.g. specific surface area (from 295.90 to 94.51 m2 g-1) and pHPZC (from 7.34 to 5.74). These changes increased the efficiency and kinetics of alumina in removing F- from synthetic solutions and groundwater (from 80%/16 h to 100%/1 h). This efficiency was not affected by the presence of other anions in groundwater, such as HCO3- and SO42-. The optimum rate of F- removal occurred at pH 5; however, during the F- removal, Al3+ and Mn2+ ions were released, respectively, from the AA (0.61 mg L-1 Al3+) and from the AM ( 52 mg L-1 Mn2+). Vermiculite used to remove these cations adsorbed about 86% Al3+ and 90% Mn2+. However, only Al3+ concentrations fell below the standard limit for drinking water of <0.5 mg L-1. Therefore, AA has the advantage of not containing Mn, and after 3 h kept F- concentrations in solutions 5 mg L-1F- below the standard limit of 1.5 mg L-1. This study revealed that, depending on the groundwater characteristics, AA may be more efficient and sustainable for defluoridation than coated alumina.
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Affiliation(s)
- Ísis Cristina Garcia Saraiva
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas da Universidade Federal de São Paulo, Diadema, Brazil
| | - Sibele Ezaki
- Instituto Geológico - Secretaria de Infraestrutura e Meio Ambiente, São Paulo, Brazil
| | - Giovanna Dias Calabria
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas da Universidade Federal de São Paulo, Diadema, Brazil
| | - Mirian Chieko Shinzato
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas da Universidade Federal de São Paulo, Diadema, Brazil
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11
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Minimizing the Fluoride Load in Water Using the Electrocoagulation Method: An Experimental Approach. ENVIRONMENTS 2022. [DOI: 10.3390/environments9030038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
The abundant presence of fluoride (F-) in surface water bodies is an environmental concern because of its effects on human health; medical reports confirmed that fluoride intake above 1.5 mg/L leads to many health complications, including but not limited to weak bones and enamel fluorosis. Thus, the World Health Organisation (WHO) defines 1.20 mg/L as the maximum permissible F- concentration in drinking water. The electrocoagulation method (EC) is globally practised to remove many pollutants from water due to its cost-effectiveness, safety, and ease of use. However, EC has some drawbacks, such as the lack of reactors’ design. In this study, a new EC reactor, which uses four drilled aluminium electrodes and a variant cross-section section container, was designed and used to remove F- from water. The design of the new EC eliminated the need for water mixers. The ability of the new EC unit to remove F- from synthetic water was evaluated at different current densities (CD) (1–3 mA/cm2), electrode distances (ELD) (5–15 mm), pH of the solution (pHoS) (4–10), and initial F- concentrations (IFC) (5–20 mg/L). The outcomes of this study prove that the new reactor could remove as much as 98.3% of 20 mg/l of F- at CD, ELD, pHoS, and IFC of 2 mA/cm2, 5 mm, and 4 and 10 mg/L, respectively.
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12
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Ayinde WB, Gitari MW, Smith JA, Samie A. Sorption of Fluoride and Bacterial Disinfection Property of Biosynthesized Nanofibrous Cellulose Decorated Ag-MgO-Nanohydroxyapatite Composite for Household Water Treatment. Polymers (Basel) 2022; 14:polym14050890. [PMID: 35267713 PMCID: PMC8912421 DOI: 10.3390/polym14050890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/07/2022] [Accepted: 02/08/2022] [Indexed: 01/27/2023] Open
Abstract
An innovative and sustainable approach to integrating modified Ag–MgO–nanohydroxyapatite on a nanofibrous cellulose template (CNF-AgMgOnHaP) as a multifunctional adsorbent via a hydrothermal bioreduction route using Citrus paradisi peel extract was developed and examined. The surface morphology and mineralogical properties of CNF-AgMgOnHaP by UV–vis spectroscopy, SEM-EDS, XRD, FTIR, TEM, and BET techniques are reported. Batch fluoride sorption studies and its disinfection potential against common bacteria in surface water were evaluated. The results showed the successful synthesis of a modified multistructural CNF-AgMgOnHaP composite with an improved BET surface area of 160.17 m2/g. The sorption of fluoride by the adsorbent was found to strongly depend on the different sorption conditions with a maximum F− sorption capacity of 8.71 mg/g at 303 K, and pH of 5 with 0.25 g dosage at 10 min contact time (25 ± 3 °C). Equilibrium fluoride sorption onto the CNF-AgMgOnHaP was best described by the Freundlich isotherm model across all the operating temperatures. The overall kinetic results showed that the adsorption mechanisms not only depend on using the pseudo-second-order process but are also governed by the mass transfer of the adsorbate molecules from the external surface onto the pores of the adsorbent. The thermodynamic parameters revealed that the adsorption process of F− onto CNF-AgMgOnHaP was endothermic and spontaneous at the sorbent/solution interface. The synthesized composite also provides some antibacterial activity against common infectious microbes from contaminated drinking water. The overall results suggested that the CNF-AgMgOnHaP nanocomposite possesses the potential for the simultaneous decontamination of pollutants and microbes in drinking water.
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Affiliation(s)
- Wasiu B. Ayinde
- Environmental Remediation and Nano Sciences (EnviReN), Department of Geography and Environmental Sciences, Faculty of Science, Engineering and Agriculture, University of Venda, Private Bag X5050, Thohoyandou 0950, South Africa;
| | - Mugera W. Gitari
- Environmental Remediation and Nano Sciences (EnviReN), Department of Geography and Environmental Sciences, Faculty of Science, Engineering and Agriculture, University of Venda, Private Bag X5050, Thohoyandou 0950, South Africa;
- School of Chemistry and Material Sciences, Technical University of Kenya, Haile Selassie Avenue, P.O. Box 52428, Nairobi 00200, Kenya
- Correspondence:
| | - James A. Smith
- Engineering Systems and Environmet, School of Engineering and Applied Sciences, University of Virginia, P.O. Box 400747, Charlottesville, VA 22904, USA;
| | - Amidou Samie
- Molecular Parasitology and Opportunistic Infections Program, Department of Biochemistry and Microbiology, Faculty of Science, Engineering, and Agriculture, University of Venda, Private Bag X5050, Thohoyandou 0950, South Africa;
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13
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Rodríguez-Iglesias J, Alcalá L, Megido L, Castrillón L. Removal of fluoride from coke wastewater by aluminum doped chelating ion-exchange resins: a tertiary treatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:8705-8715. [PMID: 34491503 PMCID: PMC8776662 DOI: 10.1007/s11356-021-16299-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 08/29/2021] [Indexed: 06/13/2023]
Abstract
Coke wastewater is one of the most problematic industrial wastewaters, due to its large volume and complex pollutant load. In this study, ion exchange technology was investigated with the objective of reducing the fluoride content of the effluent from a coke wastewater treatment plant (26.7 mg F-/L). Two Al-doped exchange resins with chelating aminomethyl-phosphonic acid and iminodiacetic groups were assessed: Al-doped TP260 and TP207 resins, respectively. The effect of resin dosage, varying from 5 to 25 g/L, was evaluated. F- removal was within the range 57.8-89.3% and 72.0-92.1% for Al-doped TP260 and TP207, respectively. A kinetic study based on a generalized integrated Langmuir kinetic equation fitted the experimental data (R2 > 0.98). The parameters of the said kinetics met the optimal conditions for the ion exchange process, which seemed to be more favorable with Al-doped TP260 resin than with Al-doped TP207 resin, using the same resin dosage. Furthermore, the experimental data were well described (R2 > 0.98) by Langmuir and Freundlich isotherm models, in agreement with the findings of the kinetic study: the maximum sorption capacity was obtained for the Al-doped TP260 resin.
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Affiliation(s)
- Jesús Rodríguez-Iglesias
- Department of Chemical and Environmental Engineering, Polytechnic School of Engineering, Gijón Campus, University of Oviedo, 33203, Gijón, Spain
| | - Lara Alcalá
- Department of Chemical and Environmental Engineering, Polytechnic School of Engineering, Gijón Campus, University of Oviedo, 33203, Gijón, Spain
| | - Laura Megido
- Department of Chemical and Environmental Engineering, Polytechnic School of Engineering, Gijón Campus, University of Oviedo, 33203, Gijón, Spain.
| | - Leonor Castrillón
- Department of Chemical and Environmental Engineering, Polytechnic School of Engineering, Gijón Campus, University of Oviedo, 33203, Gijón, Spain
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Aigbe UO, Osibote OA. Fluoride ions sorption using functionalized magnetic metal oxides nanocomposites: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:9640-9684. [PMID: 34997491 DOI: 10.1007/s11356-021-17571-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 11/12/2021] [Indexed: 06/14/2023]
Abstract
Fluoride is an anionic pollutant found superfluous in surface or groundwater as a result of anthropogenic actions from improper disposal of industrial effluents. In drinking water, superfluous fluoride has been revealed to trigger severe health problems in humans. Hence, developing a comprehensive wastewater decontamination process for the effective management and preservation of water contaminated with fluoride is desirable, as clean water demand is anticipated to intensify considerably over the upcoming years. In this regard, there have been increased efforts by researchers to create novel magnetic metal oxide nanocomposites which are functionalized for the remediation of wastewater owing to their biocompatibility, cost-effectiveness, relative ease to recover and reuse, non-noxiousness, and ease to separate from solutions using a magnetic field. This review makes an all-inclusive effort to assess the effects of experimental factors on the sorption of fluoride employing magnetic metal oxide nanosorbents. The removal efficiency of fluoride ions onto magnetic metal oxides nanocomposites were largely influenced by the solution pH and ions co-existing with fluoride. Overall, it was noticed from the reviewed researches that the maximum sorption capacity using various metal oxides for fluoride sorption was in the order of aluminium oxides >cerium oxides > iron oxides > magnesium oxides> titanium oxides, and most sorption of fluoride ions was inhibited by the existence of phosphate trailed by sulphate. The mechanism of fluoride sorption onto various sorbents was due to ion exchange, electrostatic attraction, and complexation mechanism.
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Affiliation(s)
- Uyiosa Osagie Aigbe
- Department of Mathematics and Physics, Faculty of Applied Sciences, Cape Peninsula University of Technology, Cape Town, South Africa.
| | - Otolorin Adelaja Osibote
- Department of Mathematics and Physics, Faculty of Applied Sciences, Cape Peninsula University of Technology, Cape Town, South Africa
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15
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Wang R, Wang D, Wang X, Peng W, Wang Y, Zhang J. Experimental and DFT study of F − removed by Cl −-hydrotalcite. NEW J CHEM 2022. [DOI: 10.1039/d2nj01360f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The adsorption mechanisms of F− on Cl−-LDH were identified as ion exchange, electrostatic attraction and hydrogen bonding.
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Affiliation(s)
- Ruicong Wang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, Xinjiang, China
| | - Danqi Wang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, Xinjiang, China
| | - Xinyuan Wang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, Xinjiang, China
| | - Wencai Peng
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, Xinjiang, China
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi, Xinjiang, China
| | - Yi Wang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, Xinjiang, China
| | - Jinli Zhang
- School of Chemical Engineering, Tianjin University, Tianjin 300350, China
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16
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Kalsido AW, Kumar A, Tekola B, Mogessie B, Alemayehu E. Evaluation of bentonite clay in modified and unmodified forms to remove fluoride from water. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 84:2661-2674. [PMID: 34850684 DOI: 10.2166/wst.2021.220] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The feasibility of fluoride adsorption from aqueous solutions using naturally available bentonite clay in both modified and unmodified forms is investigated in this report. Scanning electron microscopy (SEM), energy dispersive X-ray (EDX), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy analysis was applied to describe the structure and nature of modified and unmodified bentonite clay. The physicochemical characteristics of the adsorbent were also investigated for moisture content, pH, apparent density, specific surface area, cation exchange capacity and its point-of-zero charge. SEM images reveal particles are dispersed homogeneously and are irregular in shape. XRD and EDX analyses reveal that the bentonite is composed of seven materials: calcite, silica, alumina, hematite, bornite and green cinnabar, and chloride which are considered as impurities. Raw bentonite clays have shown very low fluoride removal efficiency (47.19%). Modification of the clay surface with HCl and aluminum oxide, on the other hand, increased fluoride removal efficiency to 79.77% and 94.38%, respectively. At 5 mg/L initial fluoride concentration, 10 cm bed depth packed dose of adsorbent, and 180 min breakthrough time, a 2.88 mg/g of fluoride removal capacity was observed. As a result, aluminum oxide modified bentonite clay was chosen for further investigation and the results are not presented here.
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Affiliation(s)
- Adane Woldemedhin Kalsido
- African Centre of Excellence for Water Management, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia E-mail:
| | - Arun Kumar
- Environmental Engineering, Department of Civil Engineering, Indian Institute of Technology, New Delhi, India
| | - Beteley Tekola
- African Centre of Excellence for Water Management, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia E-mail: ; School of Chemical and Bio Engineering, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
| | - Beshah Mogessie
- Water Development Commission, Ministry of Water, Irrigation, and Energy, Addis Ababa, Ethiopia
| | - Esayas Alemayehu
- African Centre of Excellence for Water Management, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia E-mail: ; Faculty of Civil & Environmental Engineering, Jimma Institute of Technology, Jimma University, P.O. Box 378, Jimma, Ethiopia
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Sharma R, Sharma R, Parveen K, Pant D, Malaviya P. Comprehensive and critical appraisal of plant-based defluoridation from environmental matrices. CHEMOSPHERE 2021; 281:130892. [PMID: 34044304 DOI: 10.1016/j.chemosphere.2021.130892] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 05/03/2021] [Accepted: 05/08/2021] [Indexed: 06/12/2023]
Abstract
Fluoride is recognized as one of the global environmental threats because of its non-biodegradable nature and long-term persistence in the environment. This has created the dire need to explore various defluoridation techniques (membrane process, adsorption, precipitation, reverse osmosis, ion exchange, and electrocoagulation). Owing to their cost ineffectiveness and high operational costs, these technologies failed to find any practical utility in fluoride remediation. Comparatively, defluoridation techniques involving the use of low-cost plant-derived adsorbents and fluoride phytoremediators are considered better alternatives. Through this review, an attempt has been made to critically synthesize information about various plant-based bioadsorbents and hyperaccumulators from existing literature. Moreover, mechanisms underlying the fluoride adsorption and accumulation by plants have been thoroughly discussed that will invigorate the researchers to develop novel ideas about process/product modifications to further enhance the removal potential of the adsorbents and plants. Literature survey unravels that various low-cost plant-derived adsorbents have shown their efficacy in defluoridation, yet there is an urgent need to explore their pragmatic application on a commercial scale.
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Affiliation(s)
- Ritika Sharma
- Department of Botany, Central University of Jammu, Samba, Jammu and Kashmir, India
| | - Rozi Sharma
- Department of Environmental Sciences, University of Jammu, Jammu, Jammu and Kashmir, India
| | - Khalida Parveen
- Department of Environmental Sciences, University of Jammu, Jammu, Jammu and Kashmir, India
| | - Deepak Pant
- Separation & Conversion Technology, Flemish Institute for Technological Research (VITO), Boeretang 200, Mol, 2400, Belgium
| | - Piyush Malaviya
- Department of Environmental Sciences, University of Jammu, Jammu, Jammu and Kashmir, India.
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Recently Developed Adsorbing Materials for Fluoride Removal from Water and Fluoride Analytical Determination Techniques: A Review. SUSTAINABILITY 2021. [DOI: 10.3390/su13137061] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
In recent years, there has been an increase in public perception of the detrimental side-effects of fluoride to human health due to its effects on teeth and bones. Today, there is a plethora of techniques available for the removal of fluoride from drinking water. Among them, adsorption is a very prospective method because of its handy operation, cost efficiency, and high selectivity. Along with efforts to assist fluoride removal from drinking waters, extensive attention has been also paid to the accurate measurement of fluoride in water. Currently, the analytical methods that are used for fluoride determination can be classified into chromatographic methods (e.g., ionic chromatography), electrochemical methods (e.g., voltammetry, potentiometry, and polarography), spectroscopic methods (e.g., molecular absorption spectrometry), microfluidic analysis (e.g., flow injection analysis and sequential injection analysis), titration, and sensors. In this review article, we discuss the available techniques and the ongoing effort for achieving enhanced fluoride removal by applying novel adsorbents such as carbon-based materials (i.e., activated carbon, graphene oxide, and carbon nanotubes) and nanostructured materials, combining metals and their oxides or hydroxides as well as natural materials. Emphasis has been given to the use of lanthanum (La) in the modification of materials, both activated carbon and hybrid materials (i.e., La/Mg/Si-AC, La/MA, LaFeO3 NPs), and in the use of MgO nanostructures, which are found to exhibit an adsorption capacity of up to 29,131 mg g−1. The existing analytical methodologies and the current trends in analytical chemistry for fluoride determination in drinking water are also discussed.
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Aloulou H, Ghorbel A, Aloulou W, Ben Amar R, Khemakhem S. Removal of fluoride ions (F -) from aqueous solutions using modified Turkish zeolite with quaternary ammonium. ENVIRONMENTAL TECHNOLOGY 2021; 42:1353-1365. [PMID: 31524562 DOI: 10.1080/09593330.2019.1668863] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 09/11/2019] [Indexed: 06/10/2023]
Abstract
The natural Turkish zeolite has been modified with hexadecyltrimethylammonium bromide (CTAB) for the elimination of fluoride (F-) from aqueous solutions. The parent natural zeolite (NZ) and modified zeolite (MZ) have been characterized by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), zeta potentials and Brunauer-Emmett-Teller (BET) method. The effect of pH, adsorbent dose, contact time, initial concentration and temperature on adsorption of fluoride ions onto modified zeolite (MZ) has been determined in batch experiments. Fluoride concentration can be reduced to 1.5 mg/L under the optimum condition (pH = 5, adsorbent dose = 20 mg/L, contact time = 60 min and T = 293 K) when initial fluoride concentration of 10 mg/L is employed. The fluoride adsorption on MZ has been described by the Langmuir isotherm and the maximum fluoride adsorption capacity was found as 2.994 mg/g. Kinetics data were best described by the pseudo-second-order model. The thermodynamic studies proved that the adsorption was exothermic and spontaneous.
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Affiliation(s)
- Hajer Aloulou
- Faculté des Sciences de Sfax, Laboratoire Sciences des Matériaux et Environnement, Université de Sfax, Sfax, Tunisia
| | - Ali Ghorbel
- Faculté des Sciences de Monastir, Laboratoire de Chimie Hétérocyclique, Produits Naturels et Réactivité (CHPNR), Monastir, Tunisia
| | - Wala Aloulou
- Faculté des Sciences de Sfax, Laboratoire Sciences des Matériaux et Environnement, Université de Sfax, Sfax, Tunisia
| | - Raja Ben Amar
- Faculté des Sciences de Sfax, Laboratoire Sciences des Matériaux et Environnement, Université de Sfax, Sfax, Tunisia
| | - Sabeur Khemakhem
- Faculté des Sciences de Sfax, Laboratoire Sciences des Matériaux et Environnement, Université de Sfax, Sfax, Tunisia
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21
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Mohamed A, Sanchez EPV, Bogdanova E, Bergfeldt B, Mahmood A, Ostvald RV, Hashem T. Efficient Fluoride Removal from Aqueous Solution Using Zirconium-Based Composite Nanofiber Membranes. MEMBRANES 2021; 11:147. [PMID: 33672530 PMCID: PMC7923772 DOI: 10.3390/membranes11020147] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/17/2021] [Accepted: 02/17/2021] [Indexed: 11/16/2022]
Abstract
Herein, composite nanofiber membranes (CNMs) derived from UiO-66 and UiO-66-NH2 Zr-metal-organic frameworks (MOFs) were successfully prepared, and they exhibited high performance in adsorptive fluoride removal from aqueous media. The resultant CNMs were confirmed using different techniques, such as X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and Brunauer-Emmett-Teller (BET) in addition to Fourier-transform infrared spectroscopy (FTIR). The parameters that govern the fluoride adsorption were evaluated, including adsorbent dose, contact time, and pH value, in addition to initial concentration. The crystalline structures of CNMs exhibited high hydrothermal stability and remained intact after fluoride adsorption. It could also be observed that the adsorbent dose has a significant effect on fluoride removal at high alkaline values. The results show that UiO-66-NH2 CNM exhibited high fluoride removal due to electrostatic interactions that strongly existed between F- and metal sites in MOF in addition to hydrogen bonds formed with MOF amino groups. The fluoride removal efficiency reached 95% under optimal conditions of 20 mg L-1, pH of 8, and 40% adsorbent dose at 60 min. The results revealed that UiO-66-NH2 CNM possesses a high maximum adsorption capacity (95 mg L-1) over UiO-66 CNM (75 mg L-1), which exhibited better fitting with the pseudo-second-order model. Moreover, when the initial fluoride concentration increased from 20 to 100 mg/L, fluoride adsorption decreased by 57% (UiO-66 CNM) and 30% (UiO-66-NH2 CNM) after 60 min. After three cycles, CNM revealed the regeneration ability, demonstrating that UiO-66-NH2 CNMs are auspicious adsorbents for fluoride from an aqueous medium.
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Affiliation(s)
- Alaa Mohamed
- Institute of Functional Interfaces (IFG), Karlsruhe Institute of Technology (KIT), Hermann-von Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (E.P.V.S.); (A.M.)
- Egypt Nanotechnology Center, EGNC, Cairo University, Giza 12613, Egypt
| | - Elvia P. Valadez Sanchez
- Institute of Functional Interfaces (IFG), Karlsruhe Institute of Technology (KIT), Hermann-von Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (E.P.V.S.); (A.M.)
| | - Evgenia Bogdanova
- School of Nuclear Science and Engineering, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia; (E.B.); (R.V.O.)
| | - Britta Bergfeldt
- Institute for Technical Chemistry (ITC), Karlsruhe Institute for Technology (KIT), Hermann-von Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany;
| | - Ammar Mahmood
- Institute of Functional Interfaces (IFG), Karlsruhe Institute of Technology (KIT), Hermann-von Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (E.P.V.S.); (A.M.)
| | - Roman V. Ostvald
- School of Nuclear Science and Engineering, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia; (E.B.); (R.V.O.)
| | - Tawheed Hashem
- Institute of Functional Interfaces (IFG), Karlsruhe Institute of Technology (KIT), Hermann-von Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (E.P.V.S.); (A.M.)
- International X-ray Optics Lab, Institute of Physics and Technology, National Research Tomsk Polytechnic University (TPU), 30 Lenin Ave., 634050 Tomsk, Russia
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22
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Bhan C, Singh J, Sharma YC. Development of adsorbent from Mentha plant ash and its application in fluoride adsorption from aqueous solution: a mechanism, isotherm, thermodynamic, and kinetics studies. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2021; 23:1113-1123. [PMID: 33561355 DOI: 10.1080/15226514.2021.1880365] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In the present study, Mentha plant ash was modified by Na and Al for the synthesis of adsorbent and applied for the removal of Fluoride from an aqueous solution. Mixture of acid washed Mentha plant ash (MPA) and NaOH (in the ratio 1:1.3) thermally treated at 600°C in a muffle furnace then treated with aqueous solution of sodium aluminate. The characterization of sodium aluminum modified ash (Na-Al-MA) powder was done such as SEM (Scanning Electron Microscopy), Particle Size Analysis (PSA), Fourier transformed spectroscopy (FTIR), Zeta Potential, XRD (X-ray Diffraction) analysis, and Brunauer-Emmett-Teller (BET) analysis. The removal of fluoride from an aqueous solution carried out with Na-Al-MA by batch adsorption process. The Na-Al-MA was found to be very effective as adsorbent. The maximum removal of fluoride was achieved ̴ 86% at neutral pH and at room temperature. It was investigated that Langmuir adsorption isotherm and pseudo-second-order kinetic was best fitted for fluoride adsorption. The fluoride adsorption on Na-Al-MA was an exothermic process. A possible mechanism including electrostatic attraction, hydrogen bonding, and metal-fluoride interaction for fluoride adsorption on Na-Al-MA have described in this study. Novelty statement: Utilization of Mentha plant ash for the development of adsorbent and its application in adsorptive removal of fluoride from aqueous solution is the novelty of this work. Adsorbent preparation may be the better way of waste biomass management.
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Affiliation(s)
- Chandra Bhan
- Laboratory of Environmental Nanotechnology and Bioremediation, Department of Environmental Science, Babasaheb Bhimrao Ambedkar University, Lucknow, India
| | - Jiwan Singh
- Laboratory of Environmental Nanotechnology and Bioremediation, Department of Environmental Science, Babasaheb Bhimrao Ambedkar University, Lucknow, India
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23
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Defluoridation in aqueous solution by a composite of reduced graphene oxide decorated with cuprous oxide via sonochemical. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.09.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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Tarali SV, Hoolikantimath NP, Kulkarni N, Ghorpade PA. A novel cement-based technology for the treatment of fluoride ions. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-2986-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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25
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Castañeda LF, Coreño O, Nava JL, Carreño G. Removal of fluoride and hydrated silica from underground water by electrocoagulation in a flow channel reactor. CHEMOSPHERE 2020; 244:125417. [PMID: 31809937 DOI: 10.1016/j.chemosphere.2019.125417] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 11/09/2019] [Accepted: 11/18/2019] [Indexed: 06/10/2023]
Abstract
This paper concerns simultaneous removal of fluoride and hydrated silica from groundwater (4.08 mg L-1 fluoride, 90 mg L-1 hydrated silica, 50 mg L-1 sulfate, 0.23 mg L-1 phosphate, pH 7.38 and 450 μS cm-1 conductivity) by electrocoagulation (EC), using an up-flow EC reactor, with a six-cell stack in a serpentine array, opened at the top of the cell to favor gas release. Aluminum plates were used as sacrificial electrodes. The effect of current density (4 ≤ j ≤ 7 mA cm-2) and mean linear flow rate (1.2 ≤ u ≤ 4.8 cm s-1), applied to the EC reactor, on the elimination of fluoride and hydrated silica was analyzed. The removal of fluoride followed the WHO guideline (<1.5 mg L-1), while the hydrated silica was abated at 7 mA cm-2 and 1.2 cm s-1, with energy consumption of 2.48 kWh m-3 and an overall operational cost of 0.441 USD m-3. Spectroscopic analyses of the flocs by XRD, XRF-EDS, SEM-EDS, and FTIR indicated that hydrated silica reacted with the coagulant forming aluminosilicates, and fluoride replaced a hydroxide from aluminum aggregates, while sulfates and phosphates were removed by adsorption process onto the flocs. The well-engineered EC reactor allowed the simultaneous removal of fluoride and hydrated silica.
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Affiliation(s)
- Locksley F Castañeda
- Departamento de Ingeniería Geomática e Hidráulica, Universidad de Guanajuato, Av. Juárez 77, Centro, 36000, Guanajuato, Guanajuato, Mexico.
| | - Oscar Coreño
- Departamento de Ingeniería Civil, Universidad de Guanajuato, Av. Juárez 77, Centro, 36000, Guanajuato, Guanajuato, Mexico.
| | - José L Nava
- Departamento de Ingeniería Geomática e Hidráulica, Universidad de Guanajuato, Av. Juárez 77, Centro, 36000, Guanajuato, Guanajuato, Mexico.
| | - Gilberto Carreño
- Departamento de Ingeniería Geomática e Hidráulica, Universidad de Guanajuato, Av. Juárez 77, Centro, 36000, Guanajuato, Guanajuato, Mexico.
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Rubio C, Rodríguez I, Jaudenes JR, Gutiérrez AJ, Paz S, Burgos A, Hardisson A, Revert C. Fluoride levels in supply water from a volcanic area in the Macaronesia region. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:11587-11595. [PMID: 31970639 DOI: 10.1007/s11356-020-07702-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 01/09/2020] [Indexed: 06/10/2023]
Abstract
Fluoride is a widely distributed ion in the environment and, consequently, in water as well. High levels of fluoride in waters can be found in the Canary Islands because of their volcanic origin. Due to the risk and detrimental effects associated with a high fluoride intake, the content of this ion has been potentiometrically determined in 256 supply water samples from the islands of Tenerife, El Hierro, and La Palma, using a fluoride selective ion electrode. Fluoride mean concentration found on Tenerife is 4.22 mg/L, exceeding the parametric value of 1.5 mg/L set out in Spanish legislation. The consumption of 2 L of water from the studied municipalities of Tenerife would mean there is an excessive fluoride intake. The consumption of this water poses a serious risk to health. It is necessary to take action aimed at reducing the level of fluoride in the north of the island of Tenerife.
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Affiliation(s)
- Carmen Rubio
- Department of Toxicology, University of La Laguna, 38071, La Laguna, Tenerife, Canary Islands, Spain
| | - Inmaculada Rodríguez
- Department of Toxicology, University of La Laguna, 38071, La Laguna, Tenerife, Canary Islands, Spain
| | - Juan R Jaudenes
- Department of Toxicology, University of La Laguna, 38071, La Laguna, Tenerife, Canary Islands, Spain
| | - Angel J Gutiérrez
- Department of Toxicology, University of La Laguna, 38071, La Laguna, Tenerife, Canary Islands, Spain
| | - Soraya Paz
- Department of Toxicology, University of La Laguna, 38071, La Laguna, Tenerife, Canary Islands, Spain.
| | - Antonio Burgos
- Department of Preventive Medicine and Public Health, University of La Laguna, 38071, La Laguna, Tenerife, Canary Islands, Spain
| | - Arturo Hardisson
- Department of Toxicology, University of La Laguna, 38071, La Laguna, Tenerife, Canary Islands, Spain
| | - Consuelo Revert
- Department of Physiotherapy, University of La Laguna, 38071, La Laguna, Tenerife, Canary Islands, Spain
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Damtie MM, Woo YC, Kim B, Hailemariam RH, Park KD, Shon HK, Park C, Choi JS. Removal of fluoride in membrane-based water and wastewater treatment technologies: Performance review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 251:109524. [PMID: 31542619 DOI: 10.1016/j.jenvman.2019.109524] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 08/15/2019] [Accepted: 09/02/2019] [Indexed: 06/10/2023]
Abstract
The presence of excess fluoride in aqueous media above local environmental standards (e.g., the U.S. Environmental Protection Agency (EPA) standard of 4 mg/L) affects the health of aquatic life. Excess fluoride in drinking water above the maximum contaminant level (e.g., the World Health Organization (WHO) standard of 1.5 mg/L) also affects the skeletal and nervous systems of humans. Fluoride removal from aqueous solutions is difficult using conventional electrochemical, precipitation, and adsorption methods owing to its ionic size and reactivity. Thus, new technologies have been introduced to reduce the fluoride concentration in industrial wastewater effluents and various drinking water sources. Membrane technology is one of the newer technologies found to be very effective in significantly reducing fluoride to desired standards levels; however, it has received less attention than other technologies because it is perceived as a costly process. This study critically reviewed the performance of various membrane process and compared it with effluent and zero liquid discharge (ZLD) standards. The performance review has been conducted with the consideration of the theoretical background, rejection mechanisms, technical viability, and parameters affecting flux and rejection performance. This review includes membrane systems investigated for the defluoridation process but operated under pressure (i.e., reverse osmosis [RO] and nanofiltration [NF]), temperature gradients (i.e., membrane distillation [MD]), electrical potential gradients (i.e., electrodialysis [ED] and Donnan dialysis [DD]), and concentration differences (i.e., forward osmosis [FO]). Moreover, the study also addressed the advantages, limitations, & applicable conditions of each membrane based defluoridation process.
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Affiliation(s)
- Mekdimu Mezemir Damtie
- Department of Construction Environment Engineering, KICT School, University of Science & Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, Republic of Korea
| | - Yun Chul Woo
- Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyang-Daero, Goyang-Si, Gyeonggi-Do, 10223, Republic of Korea
| | - Bongchul Kim
- Water Transportation Environmental Center, Environmental Technology Division, Korea Testing Laboratory (KTL), 87 Digital-ro 26-gil, Guro-gu, Seoul, 08389, Republic of Korea
| | - Ruth Habte Hailemariam
- Department of Construction Environment Engineering, KICT School, University of Science & Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, Republic of Korea
| | - Kwang-Duck Park
- Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyang-Daero, Goyang-Si, Gyeonggi-Do, 10223, Republic of Korea
| | - Ho Kyong Shon
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), P.O. Box 123, Broadway, Ultimo, NSW, 2007, Australia
| | - Chanhyuk Park
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, 03760, Republic of Korea.
| | - June-Seok Choi
- Department of Construction Environment Engineering, KICT School, University of Science & Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, Republic of Korea; Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyang-Daero, Goyang-Si, Gyeonggi-Do, 10223, Republic of Korea.
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Bonyadi Z, Kumar PS, Foroutan R, Kafaei R, Arfaeinia H, Farjadfard S, Ramavandi B. Ultrasonic-assisted synthesis of Populus alba activated carbon for water defluorination: Application for real wastewater. KOREAN J CHEM ENG 2019. [DOI: 10.1007/s11814-019-0373-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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29
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Mena VF, Betancor-Abreu A, González S, Delgado S, Souto RM, Santana JJ. Fluoride removal from natural volcanic underground water by an electrocoagulation process: Parametric and cost evaluations. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 246:472-483. [PMID: 31200181 DOI: 10.1016/j.jenvman.2019.05.147] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 05/24/2019] [Accepted: 05/29/2019] [Indexed: 06/09/2023]
Abstract
Excessive fluoride content in groundwater can cause serious risks to human health, and sources of groundwater intended for human consumption should be treated to reduce fluoride concentrations down to acceptable levels. In the particular case of the island of Tenerife (Canary Islands, Spain), the water supply comes mainly from aquifers of volcanic origin with a high content of fluorides that make them unacceptable for human consumption without prior conditioning treatment. The treatments that generate a high rejection of water are not acceptable because water is a scarce natural resource of high value. An electrocoagulation process was investigated as a method to treat natural groundwater from volcanic soils containing a hazardously high fluoride content. The operating parameters of an electrocoagulation reactor model with parallel plate aluminum electrodes were optimized for batch and continuous flow operations. In the case of the batch operation, acidification of the water improved the removal efficiency of fluoride, which was the highest at pH 3. However, operation at the natural pH of the water achieved elimination efficiencies between 82 and 92%, depending on the applied current density. An optimum current density of 5 mA/cm2 was found in terms of maximum removal efficiency, and the kinetics of fluoride removal conformed to pseudo-second-order kinetics. In the continuous-flow operation, with the optimal residence time of 10 min and a separation of 0.5 cm between the electrodes, it was observed that the current density that would be applied would depend on the initial concentration of fluoride in the raw water. Thus, an initial fluoride concentration of 6.02 mg/L required a current density >7.5 mA/cm2 to comply with the legal guidelines in the product water, while for an initial concentration of 8.98 mg/L, the optimal current density was 10 mA/cm2. Under these operating conditions, the electrocoagulation process was able to reduce the fluoride concentration of natural groundwater to below 1.5 mg/L according to WHO guidelines with an operating cost between 0.20 and 0.26 €/m3 of treated water.
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Affiliation(s)
- V F Mena
- Department of Chemistry, Universidad de La Laguna, P.O. Box 456, E-38200, La Laguna (Tenerife), Spain
| | - A Betancor-Abreu
- Department of Chemistry, Universidad de La Laguna, P.O. Box 456, E-38200, La Laguna (Tenerife), Spain
| | - S González
- Department of Chemistry, Universidad de La Laguna, P.O. Box 456, E-38200, La Laguna (Tenerife), Spain
| | - S Delgado
- Department of Chemical Engineering and Pharmaceutical Technology, Universidad de La Laguna, P.O. Box 456, E-38200, La Laguna (Tenerife), Spain
| | - R M Souto
- Department of Chemistry, Universidad de La Laguna, P.O. Box 456, E-38200, La Laguna (Tenerife), Spain; Institute of Materials and Nanotechnology, Universidad de La Laguna, P.O. Box 456, E-38200, La Laguna (Tenerife), Spain.
| | - J J Santana
- Department of Process Engineering, Universidad de Las Palmas de Gran Canaria, Campus Universitario de Tafira, E-35017, Las Palmas de Gran Canaria (Gran Canaria), Spain.
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30
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Perovskite Structure Associated with Precious Metals: Influence on Heterogenous Catalytic Process. Catalysts 2019. [DOI: 10.3390/catal9090721] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The use of perovskite-based materials and their derivatives can have an important role in the heterogeneous catalytic field based on photochemical processes. Photochemical reactions have a great potential to solve environmental damage issues. The presence of precious metals in the perovskite structure (i.e., Ag, Au, or Pt) may improve its efficiency significantly. The precious metal may comprise the perovskite lattice as well as form a heterostructure with it. The efficiency of catalytic materials is directly related to processing conditions. Based on this, this review will address the use of perovskite materials combined with precious metal as well as their processing methods for the use in catalyzed reactions.
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31
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Idini A, Dore E, Fancello D, Frau F. Defluoridation of water through the transformation of octacalcium phosphate into fluorapatite. Heliyon 2019; 5:e02288. [PMID: 31463396 PMCID: PMC6706606 DOI: 10.1016/j.heliyon.2019.e02288] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 06/17/2019] [Accepted: 08/08/2019] [Indexed: 11/26/2022] Open
Abstract
The consumption of water with fluoride concentration higher than 1.5 mg/L (WHO recommended limit) is recognized to cause serious diseases, and fluoride removal from natural contaminated waters is a health priority for more than 260 million people worldwide. The octacalcium phosphate (OCP), a mineralogical precursor of bio-apatite, is here tested as a fluoride remover. A new two-step method for the synthesis of OCP is proposed: 1) synthesis of brushite from calcium carbonate and phosphoric acid; 2) subsequent hydrolysis of brushite. Fluoride removal experiments are performed in batch-mode using different initial concentrations of fluoride (from 40 to 140 mg/L) and reaction times. Most of fluoride is removed within the first 2 h of all experiments, and the drinkable limit of 1.5 mg/L is reached within a minimum of 3 h for an initial fluoride concentration of 40 mg/L. The experimental fluoride removal capacity of OCP is 25.7 mg/g, and 4 g of OCP can effectively treat 1 L of water with fluoride concentration up to 50 times higher than the drinking limit of 1.5 mg/L. XRD and chemical characterization of the solid phases, before and after the removal experiments, indicate that OCP transforms into fluorapatite (FAP) uptaking fluoride from solution.
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Affiliation(s)
| | | | | | - Franco Frau
- Department of Chemical and Geological Sciences, University of Cagliari, 09042, Monserrato (CA), Italy
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32
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Noor IE, Coenen J, Martin A, Dahl O, Åslin M. Experimental investigation and techno-economic analysis of tetramethylammonium hydroxide removal from wastewater in nano-electronics manufacturing via membrane distillation. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.02.067] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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33
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Barathi M, Kumar ASK, Rajesh N. Impact of fluoride in potable water – An outlook on the existing defluoridation strategies and the road ahead. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.02.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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34
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Parashar K, Pillay K, Das R, Maity A. Fluoride Toxicity and Recent Advances in Water Defluoridation with Specific Emphasis on Nanotechnology. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/978-3-030-04474-9_9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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35
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Simultaneous removal of fluoride and arsenic from groundwater by electrocoagulation using a filter-press flow reactor with a three-cell stack. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.02.018] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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36
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Wang J, Singh A, Talha M, Luo X, Deng X, Lin Y. Electrochemical and Theoretical Study of Imidazole Derivative as Effective Corrosion Inhibitor for Aluminium. INT J ELECTROCHEM SC 2018; 13:11539-11548. [DOI: 10.20964/2018.12.44] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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37
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Wang J, Singh A, Talha M, Luo X, Deng X, Lin Y. Electrochemical and Theoretical Study of Imidazole Derivative as Effective Corrosion Inhibitor for Aluminium. INT J ELECTROCHEM SC 2018; 13:11263-11272. [DOI: 10.20964/2018.11.72] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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38
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Rajput A, Raj SK, Sharma PP, Yadav V, Sarvaia H, Gupta H, Kulshrestha V. Synthesis and characterization of aluminium modified graphene oxide: an approach towards defluoridation of potable water. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2018.1496836] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Abhishek Rajput
- CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific & Industrial Research (CSIR), Bhavnagar, Gujarat, India
| | - Savan K. Raj
- CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific & Industrial Research (CSIR), Bhavnagar, Gujarat, India
| | - Prem P. Sharma
- CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific & Industrial Research (CSIR), Bhavnagar, Gujarat, India
| | - Vikrant Yadav
- CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific & Industrial Research (CSIR), Bhavnagar, Gujarat, India
| | - Hitesh Sarvaia
- CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific & Industrial Research (CSIR), Bhavnagar, Gujarat, India
| | - Hariom Gupta
- CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific & Industrial Research (CSIR), Bhavnagar, Gujarat, India
| | - Vaibhav Kulshrestha
- CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific & Industrial Research (CSIR), Bhavnagar, Gujarat, India
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Biswas G, Thakurta SG, Chakrabarty J, Adhikari K, Dutta S. Evaluation of fluoride bioremediation and production of biomolecules by living cyanobacteria under fluoride stress condition. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 148:26-36. [PMID: 29031116 DOI: 10.1016/j.ecoenv.2017.10.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 10/05/2017] [Accepted: 10/05/2017] [Indexed: 06/07/2023]
Abstract
Application of microalgae for defluoridation has gained interest in recent years. In the present study, bioremediation of fluoride using living cyanobacteria, Starria zimbabweensis, collected from wastewater of coke-oven effluent treatment plant, Durgapur, India, has been investigated. Initially, the cyanobacterial strain was grown in BG11 medium at 25°C, 45μmol/m2/s irradiation in 18h: 6h light:dark cycle in an algal incubator. Samples were withdrawn after 2 days interval and analyzed for its dry biomass and lipid content. Optimum inoculum size of 10% and age of 16th day were assessed based on maximum dry biomass (9.307 ± 0.01g/L) and lipid (244.05 ± 0.02mg/L) production. SEM-EDX and FTIR studies of both native and fluoride treated biomass were done to emphasize the changes. During kinetic study of defluoridation, initial fluoride concentration was varied in the range of 10-50mg/L. Maximum fluoride removal (66.6 ± 0.11%) and dry biomass (18.19 ± 0.12g/L) were obtained at 10mg/L fluoride concentration using 10% of 16th day's inoculum. Biomass and lipid content were found to increase 2 and 4 folds, respectively under fluoride stress condition. Furthermore, chlorophyll, carbohydrate and protein content of the biomass were also compared between control and fluoride contaminated conditions. Fatty Acid Methyl Ester (FAME) analysis was done using Gas Chromatography (GC) to compare the lipid profile of native and fluoride loaded strain.
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Affiliation(s)
- Gargi Biswas
- Department of Chemical Engineering, National Institute of Technology Durgapur, Durgapur 713209, India
| | - Sohini Guha Thakurta
- Department of Chemistry, National Institute of Technology Durgapur, Durgapur 713209, India
| | - Jitamanyu Chakrabarty
- Department of Chemistry, National Institute of Technology Durgapur, Durgapur 713209, India
| | - Kalyan Adhikari
- Department of Earth and Environmental Studies, National Institute of Technology Durgapur, Durgapur 713209, India
| | - Susmita Dutta
- Department of Chemical Engineering, National Institute of Technology Durgapur, Durgapur 713209, India.
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40
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Dubey S, Agrawal M, Gupta AB. Advances in coagulation technique for treatment of fluoride-contaminated water: a critical review. REV CHEM ENG 2018. [DOI: 10.1515/revce-2017-0043] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Fluoride contamination of groundwater has become a major concern worldwide, resulting in serious medical conditions such as dental and skeletal fluorosis. Consequently, the WHO recommends that drinking water should not contain more than 1.5 mg/l of fluoride. Various defluoridation techniques such as coagulation, reverse osmosis, activated alumina adsorption, and biosorbent adsorption have been developed. Adsorption through the activated alumina and biosorbent process is not cost effective and has regeneration problems, and the reverse osmosis process has the high initial cost which makes it unacceptable for developing countries. Coagulation is a commonly employed field technology for defluoridation, which involves the addition of aluminum salts, lime, and bleaching powder followed by rapid mixing, flocculation, sedimentation, and filtration but suffers from a limitation of high residual aluminum in treated water. This paper critically reviews the recent developments in the coagulation technique for defluoridation along with its comparison to other defluoridation techniques. The review describes the pertinent gaps in the process and throws open suggestions for extending research by citing the recent studies which may lead to the revival of the process. The description about the suspension of alumino-fluoro complexes that constitute a substantial part of the residual aluminum after alum treatment has been narrated in the paper that helps in a deeper understanding of the defluoridation mechanism. To make the process highly suitable for communities, appropriate technological interventions, such as converting it to a continuous mode of operation, replacing alum with poly-aluminum chloride (PAC), and attaching a micro-filtration unit in series of the existing process, can be done. Also, using PAC as a coagulant with sand filtration has to be considered for making the process more efficient.
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Affiliation(s)
- Swati Dubey
- Department of Chemical Engineering , Malaviya National Institute of Technology , Jaipur 30201 , India
| | - Madhu Agrawal
- Department of Chemical Engineering , Malaviya National Institute of Technology , Jaipur 30201 , India
| | - Akhilendra Bhushan Gupta
- Department of Civil Engineering , Malaviya National Institute of Technology , Jaipur 30201 , India
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41
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Hiremath PG, Theodore T. Modelling of Fluoride Biosorption by Calcium-doped Algae Using Response Surface Methodology. Chem Ind 2018. [DOI: 10.1080/00194506.2017.1281771] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Poornima G. Hiremath
- Department of Chemical Engineering, Siddaganga Institute of Technology, Tumkur 572103 Karnataka, India
| | - Thomas Theodore
- Department of Chemical Engineering, Siddaganga Institute of Technology, Tumkur 572103 Karnataka, India
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42
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Zirconium-Doped Fungal Sorbents: Preparation, Characterization, Adsorption Isotherm, and Kinetic and Mathematical Modelling Study for Removal of Fluoride. ACTA ACUST UNITED AC 2016. [DOI: 10.1155/2016/6848693] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The present study involves usage of more efficient and eco-friendly zirconium-doped, fluoride-resistant fungal biosorbents for removal of excess fluoride from groundwater. It was observed that >94% fluoride removal was possible at optimal conditions for the four fungal species studied. The adsorption isotherm studies indicated that zirconium-doped Aspergillus ficuum SIT-CH-2, Aspergillus terreus SIT-CH-3, and Aspergillus flavipes SIT-CH-4 were best described by Freundlich isotherm and zirconium-doped Penicillium camemberti SIT-CH-1 fitted well with Langmuir adsorption isotherm equation. The pseudo-second-order kinetics model showed the best fit for all of the four zirconium-doped fungal species for the fluoride biosorption.
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